diff --git a/drivers/hwspinlock/stm32_hwspinlock.c b/drivers/hwspinlock/stm32_hwspinlock.c
index a32bde4..74afb4a 100644
--- a/drivers/hwspinlock/stm32_hwspinlock.c
+++ b/drivers/hwspinlock/stm32_hwspinlock.c
@@ -7,6 +7,7 @@
 #include <clk.h>
 #include <dm.h>
 #include <hwspinlock.h>
+#include <malloc.h>
 #include <asm/io.h>
 
 #define STM32_MUTEX_COREID	BIT(8)